add support for the jest runner’s node environment

lib/index.js

@@ -29,7 +29,7 @@ if (typeof Realm != 'undefined') {
     // The userAgent will be defined when running in a browser (such as Chrome debugging mode).
     realmConstructor = require('./browser').default; // (exported as ES6 module)
 // eslint-disable-next-line
-} else if (typeof process == 'object' && ('' + process) == '[object process]') {
+} else if (typeof process == 'object' && (('' + process) == '[object process]' || typeof jest == 'object')) {
     // Prevent React Native packager from seeing this module.
     var bindings = 'bindings';
     realmConstructor = require(bindings)('realm').Realm;

scripts/test.sh

@@ -162,7 +162,7 @@ case "$TARGET" in
   scripts/download-core.sh node
   src/node/build-node.sh $CONFIGURATION
 
-  for runner in ava mocha; do
+  for runner in ava mocha jest; do
     pushd "$SRCROOT/tests/test-runners/$runner"
     npm install
     npm test

tests/test-runners/jest/package.json

@@ -0,0 +1,15 @@
+{
+  "scripts": {
+    "test": "jest"
+  },
+  "devDependencies": {
+    "jest-cli": "^13.2.3"
+  },
+  "jest": {
+      "testEnvironment": "node",
+      "unmockedModulePathPatterns": [
+          "realm"
+      ],
+      "testRegex": "test.js"
+  }
+}

tests/test-runners/jest/test.js

@@ -0,0 +1,7 @@
+describe('Realm', function() {
+   it('should be requirable', function() {
+       var realm = require('realm');
+       expect(typeof realm).toBe('function');
+       expect(realm.name).toBe('Realm');
+   });
+});